31302001040 has 40 divisors (see below), whose sum is σ = 74552212728. Its totient is φ = 12215413760.

The previous prime is 31302001037. The next prime is 31302001061. The reversal of 31302001040 is 4010020313.

It can be written as a sum of positive squares in 4 ways, for example, as 1357775104 + 29944225936 = 36848^2 + 173044^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×31302001040² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4768367 + ... + 4774926.

Almost surely, 2^31302001040 is an apocalyptic number.

It is an amenable number.

31302001040 is an abundant number, since it is smaller than the sum of its proper divisors (43250211688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31302001040 is a wasteful number, since it uses less digits than its factorization.

31302001040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9543347 (or 9543341 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 31302001040 its reverse (4010020313), we get a palindrome (35312021353).

The spelling of 31302001040 in words is "thirty-one billion, three hundred two million, one thousand, forty".